@article{10_37236_161,
     author = {L. B. Richmond and Jeffrey Shallit},
     title = {Counting abelian squares},
     journal = {The electronic journal of combinatorics},
     year = {2009},
     volume = {16},
     number = {1},
     doi = {10.37236/161},
     zbl = {1191.68479},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/161/}
}